I don't think an HWC approved build would be a "useful" idea. There are many reasons for this but here's my main one:

Brand preference

Different people have loyalty/preference to different brands.

For instance, suppose you start off your build with the Corsair 800D. Right there, I won't buy that setup no matter what. I'm an Antec guy and can't be seen with a glorified P183 copycat of a case that the 800D is.

Or try suggesting an Intel SSD to a die-hard OCZ fan. It won't work!

HWC is an excellent hardware site but I believe their "core competency" is to write objective, informative and neutral reviews; not to put together a plan for your next PC build. You make your OWN plan based on reviews and other factors.